[Python-checkins] cpython (2.7): Issue #20440: Massive replacing unsafe attribute setting code with special
serhiy.storchaka
python-checkins at python.org
Thu Dec 24 03:40:34 EST 2015
https://hg.python.org/cpython/rev/23296440b654
changeset: 99668:23296440b654
branch: 2.7
parent: 99657:d7b5c2f99a99
user: Serhiy Storchaka <storchaka at gmail.com>
date: Thu Dec 24 10:35:35 2015 +0200
summary:
Issue #20440: Massive replacing unsafe attribute setting code with special
macro Py_SETREF.
files:
Include/object.h | 23 ++++++++++++++++
Misc/NEWS | 3 ++
Modules/_bsddb.c | 15 +++-------
Modules/_csv.c | 6 +--
Modules/_ctypes/_ctypes.c | 33 ++++++++----------------
Modules/_curses_panel.c | 5 +--
Modules/_json.c | 3 +-
Modules/_sqlite/connection.c | 13 +++-----
Modules/_sqlite/cursor.c | 13 +++-----
Modules/_sre.c | 3 +-
Modules/_ssl.c | 3 +-
Modules/bz2module.c | 5 +--
Modules/cPickle.c | 24 +++++-----------
Modules/cdmodule.c | 6 +--
Modules/itertoolsmodule.c | 3 +-
Modules/signalmodule.c | 3 +-
Modules/zlibmodule.c | 6 +--
Objects/descrobject.c | 3 +-
Objects/exceptions.c | 8 ++---
Objects/fileobject.c | 6 +--
Objects/frameobject.c | 3 +-
Objects/funcobject.c | 9 ++----
Objects/stringobject.c | 6 +--
Objects/typeobject.c | 6 +--
Objects/unicodeobject.c | 3 +-
Python/_warnings.c | 3 +-
Python/ceval.c | 3 +-
Python/compile.c | 5 +--
28 files changed, 94 insertions(+), 128 deletions(-)
diff --git a/Include/object.h b/Include/object.h
--- a/Include/object.h
+++ b/Include/object.h
@@ -824,6 +824,29 @@
#define Py_XINCREF(op) do { if ((op) == NULL) ; else Py_INCREF(op); } while (0)
#define Py_XDECREF(op) do { if ((op) == NULL) ; else Py_DECREF(op); } while (0)
+/* Safely decref `op` and set `op` to `op2`.
+ *
+ * As in case of Py_CLEAR "the obvious" code can be deadly:
+ *
+ * Py_XDECREF(op);
+ * op = op2;
+ *
+ * The safe way is:
+ *
+ * Py_SETREF(op, op2);
+ *
+ * That arranges to set `op` to `op2` _before_ decref'ing, so that any code
+ * triggered as a side-effect of `op` getting torn down no longer believes
+ * `op` points to a valid object.
+ */
+
+#define Py_SETREF(op, op2) \
+ do { \
+ PyObject *_py_tmp = (PyObject *)(op); \
+ (op) = (op2); \
+ Py_XDECREF(_py_tmp); \
+ } while (0)
+
/*
These are provided as conveniences to Python runtime embedders, so that
they can have object code that is not dependent on Python compilation flags.
diff --git a/Misc/NEWS b/Misc/NEWS
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -10,6 +10,9 @@
Core and Builtins
-----------------
+- Issue #20440: Massive replacing unsafe attribute setting code with special
+ macro Py_SETREF.
+
- Issue #25421: __sizeof__ methods of builtin types now use dynamic basic size.
This allows sys.getsize() to work correctly with their subclasses with
__slots__ defined.
diff --git a/Modules/_bsddb.c b/Modules/_bsddb.c
--- a/Modules/_bsddb.c
+++ b/Modules/_bsddb.c
@@ -1607,9 +1607,8 @@
}
/* Save a reference to the callback in the secondary DB. */
- Py_XDECREF(secondaryDB->associateCallback);
Py_XINCREF(callback);
- secondaryDB->associateCallback = callback;
+ Py_SETREF(secondaryDB->associateCallback, callback);
secondaryDB->primaryDBType = _DB_get_type(self);
/* PyEval_InitThreads is called here due to a quirk in python 1.5
@@ -2498,9 +2497,8 @@
DB_set_private(DBObject* self, PyObject* private_obj)
{
/* We can set the private field even if db is closed */
- Py_DECREF(self->private_obj);
Py_INCREF(private_obj);
- self->private_obj = private_obj;
+ Py_SETREF(self->private_obj, private_obj);
RETURN_NONE();
}
@@ -6998,9 +6996,8 @@
DBEnv_set_private(DBEnvObject* self, PyObject* private_obj)
{
/* We can set the private field even if dbenv is closed */
- Py_DECREF(self->private_obj);
Py_INCREF(private_obj);
- self->private_obj = private_obj;
+ Py_SETREF(self->private_obj, private_obj);
RETURN_NONE();
}
@@ -7253,9 +7250,8 @@
return NULL;
}
- Py_XDECREF(self->event_notifyCallback);
Py_INCREF(notifyFunc);
- self->event_notifyCallback = notifyFunc;
+ Py_SETREF(self->event_notifyCallback, notifyFunc);
/* This is to workaround a problem with un-initialized threads (see
comment in DB_associate) */
@@ -7413,9 +7409,8 @@
MYDB_END_ALLOW_THREADS;
RETURN_IF_ERR();
- Py_DECREF(self->rep_transport);
Py_INCREF(rep_transport);
- self->rep_transport = rep_transport;
+ Py_SETREF(self->rep_transport, rep_transport);
RETURN_NONE();
}
diff --git a/Modules/_csv.c b/Modules/_csv.c
--- a/Modules/_csv.c
+++ b/Modules/_csv.c
@@ -276,9 +276,8 @@
return -1;
}
else {
- Py_XDECREF(*target);
Py_INCREF(src);
- *target = src;
+ Py_SETREF(*target, src);
}
}
return 0;
@@ -770,8 +769,7 @@
static int
parse_reset(ReaderObj *self)
{
- Py_XDECREF(self->fields);
- self->fields = PyList_New(0);
+ Py_SETREF(self->fields, PyList_New(0));
if (self->fields == NULL)
return -1;
self->field_len = 0;
diff --git a/Modules/_ctypes/_ctypes.c b/Modules/_ctypes/_ctypes.c
--- a/Modules/_ctypes/_ctypes.c
+++ b/Modules/_ctypes/_ctypes.c
@@ -424,8 +424,7 @@
Py_DECREF((PyObject *)dict);
return NULL;
}
- Py_DECREF(result->tp_dict);
- result->tp_dict = (PyObject *)dict;
+ Py_SETREF(result->tp_dict, (PyObject *)dict);
dict->format = _ctypes_alloc_format_string(NULL, "B");
if (dict->format == NULL) {
Py_DECREF(result);
@@ -903,8 +902,7 @@
return -1;
}
Py_INCREF(proto);
- Py_XDECREF(stgdict->proto);
- stgdict->proto = proto;
+ Py_SETREF(stgdict->proto, proto);
return 0;
}
@@ -994,8 +992,7 @@
Py_DECREF((PyObject *)stgdict);
return NULL;
}
- Py_DECREF(result->tp_dict);
- result->tp_dict = (PyObject *)stgdict;
+ Py_SETREF(result->tp_dict, (PyObject *)stgdict);
return (PyObject *)result;
}
@@ -1460,8 +1457,7 @@
Py_DECREF((PyObject *)stgdict);
return NULL;
}
- Py_DECREF(result->tp_dict);
- result->tp_dict = (PyObject *)stgdict;
+ Py_SETREF(result->tp_dict, (PyObject *)stgdict);
/* Special case for character arrays.
A permanent annoyance: char arrays are also strings!
@@ -1884,8 +1880,7 @@
Py_DECREF((PyObject *)stgdict);
return NULL;
}
- Py_DECREF(result->tp_dict);
- result->tp_dict = (PyObject *)stgdict;
+ Py_SETREF(result->tp_dict, (PyObject *)stgdict);
return (PyObject *)result;
}
@@ -2393,8 +2388,7 @@
Py_DECREF((PyObject *)stgdict);
return NULL;
}
- Py_DECREF(result->tp_dict);
- result->tp_dict = (PyObject *)stgdict;
+ Py_SETREF(result->tp_dict, (PyObject *)stgdict);
if (-1 == make_funcptrtype_dict(stgdict)) {
Py_DECREF(result);
@@ -2536,8 +2530,7 @@
}
ob = PyCData_GetContainer(target);
if (ob->b_objects == NULL || !PyDict_CheckExact(ob->b_objects)) {
- Py_XDECREF(ob->b_objects);
- ob->b_objects = keep; /* refcount consumed */
+ Py_SETREF(ob->b_objects, keep); /* refcount consumed */
return 0;
}
key = unique_key(target, index);
@@ -3059,9 +3052,8 @@
"the errcheck attribute must be callable");
return -1;
}
- Py_XDECREF(self->errcheck);
Py_XINCREF(ob);
- self->errcheck = ob;
+ Py_SETREF(self->errcheck, ob);
return 0;
}
@@ -3090,9 +3082,8 @@
return -1;
}
Py_XDECREF(self->checker);
- Py_XDECREF(self->restype);
Py_INCREF(ob);
- self->restype = ob;
+ Py_SETREF(self->restype, ob);
self->checker = PyObject_GetAttrString(ob, "_check_retval_");
if (self->checker == NULL)
PyErr_Clear();
@@ -3130,11 +3121,9 @@
converters = converters_from_argtypes(ob);
if (!converters)
return -1;
- Py_XDECREF(self->converters);
- self->converters = converters;
- Py_XDECREF(self->argtypes);
+ Py_SETREF(self->converters, converters);
Py_INCREF(ob);
- self->argtypes = ob;
+ Py_SETREF(self->argtypes, ob);
}
return 0;
}
diff --git a/Modules/_curses_panel.c b/Modules/_curses_panel.c
--- a/Modules/_curses_panel.c
+++ b/Modules/_curses_panel.c
@@ -283,9 +283,8 @@
PyErr_SetString(PyCursesError, "replace_panel() returned ERR");
return NULL;
}
- Py_DECREF(po->wo);
- po->wo = temp;
- Py_INCREF(po->wo);
+ Py_INCREF(temp);
+ Py_SETREF(po->wo, temp);
Py_INCREF(Py_None);
return Py_None;
}
diff --git a/Modules/_json.c b/Modules/_json.c
--- a/Modules/_json.c
+++ b/Modules/_json.c
@@ -1717,8 +1717,7 @@
}
else if (PyUnicode_Check(s->encoding)) {
PyObject *tmp = PyUnicode_AsEncodedString(s->encoding, NULL, NULL);
- Py_DECREF(s->encoding);
- s->encoding = tmp;
+ Py_SETREF(s->encoding, tmp);
}
if (s->encoding == NULL)
goto bail;
diff --git a/Modules/_sqlite/connection.c b/Modules/_sqlite/connection.c
--- a/Modules/_sqlite/connection.c
+++ b/Modules/_sqlite/connection.c
@@ -228,8 +228,8 @@
node = node->next;
}
- Py_DECREF(self->statement_cache);
- self->statement_cache = (pysqlite_Cache*)PyObject_CallFunction((PyObject*)&pysqlite_CacheType, "O", self);
+ Py_SETREF(self->statement_cache,
+ (pysqlite_Cache *)PyObject_CallFunction((PyObject *)&pysqlite_CacheType, "O", self));
Py_DECREF(self);
self->statement_cache->decref_factory = 0;
}
@@ -346,9 +346,8 @@
_pysqlite_drop_unused_cursor_references(self);
if (cursor && self->row_factory != Py_None) {
- Py_XDECREF(((pysqlite_Cursor*)cursor)->row_factory);
Py_INCREF(self->row_factory);
- ((pysqlite_Cursor*)cursor)->row_factory = self->row_factory;
+ Py_SETREF(((pysqlite_Cursor *)cursor)->row_factory, self->row_factory);
}
return cursor;
@@ -816,8 +815,7 @@
}
}
- Py_DECREF(self->statements);
- self->statements = new_list;
+ Py_SETREF(self->statements, new_list);
}
static void _pysqlite_drop_unused_cursor_references(pysqlite_Connection* self)
@@ -848,8 +846,7 @@
}
}
- Py_DECREF(self->cursors);
- self->cursors = new_list;
+ Py_SETREF(self->cursors, new_list);
}
PyObject* pysqlite_connection_create_function(pysqlite_Connection* self, PyObject* args, PyObject* kwargs)
diff --git a/Modules/_sqlite/cursor.c b/Modules/_sqlite/cursor.c
--- a/Modules/_sqlite/cursor.c
+++ b/Modules/_sqlite/cursor.c
@@ -172,8 +172,7 @@
return 0;
}
- Py_XDECREF(self->row_cast_map);
- self->row_cast_map = PyList_New(0);
+ Py_SETREF(self->row_cast_map, PyList_New(0));
for (i = 0; i < sqlite3_column_count(self->statement->st); i++) {
converter = NULL;
@@ -544,9 +543,8 @@
}
/* reset description and rowcount */
- Py_DECREF(self->description);
Py_INCREF(Py_None);
- self->description = Py_None;
+ Py_SETREF(self->description, Py_None);
self->rowcount = -1L;
func_args = PyTuple_New(1);
@@ -571,8 +569,8 @@
}
if (self->statement->in_use) {
- Py_DECREF(self->statement);
- self->statement = PyObject_New(pysqlite_Statement, &pysqlite_StatementType);
+ Py_SETREF(self->statement,
+ PyObject_New(pysqlite_Statement, &pysqlite_StatementType));
if (!self->statement) {
goto error;
}
@@ -683,8 +681,7 @@
numcols = sqlite3_column_count(self->statement->st);
Py_END_ALLOW_THREADS
- Py_DECREF(self->description);
- self->description = PyTuple_New(numcols);
+ Py_SETREF(self->description, PyTuple_New(numcols));
if (!self->description) {
goto error;
}
diff --git a/Modules/_sre.c b/Modules/_sre.c
--- a/Modules/_sre.c
+++ b/Modules/_sre.c
@@ -2054,8 +2054,7 @@
if (!copy)
return 0;
- Py_DECREF(*object);
- *object = copy;
+ Py_SETREF(*object, copy);
return 1; /* success */
}
diff --git a/Modules/_ssl.c b/Modules/_ssl.c
--- a/Modules/_ssl.c
+++ b/Modules/_ssl.c
@@ -1467,8 +1467,7 @@
return -1;
#else
Py_INCREF(value);
- Py_DECREF(self->ctx);
- self->ctx = (PySSLContext *) value;
+ Py_SETREF(self->ctx, (PySSLContext *)value);
SSL_set_SSL_CTX(self->ssl, self->ctx->ctx);
#endif
} else {
diff --git a/Modules/bz2module.c b/Modules/bz2module.c
--- a/Modules/bz2module.c
+++ b/Modules/bz2module.c
@@ -1953,9 +1953,8 @@
self->running = 0;
input_left += bzs->avail_in;
if (input_left != 0) {
- Py_DECREF(self->unused_data);
- self->unused_data =
- PyString_FromStringAndSize(bzs->next_in, input_left);
+ Py_SETREF(self->unused_data,
+ PyString_FromStringAndSize(bzs->next_in, input_left));
if (self->unused_data == NULL)
goto error;
}
diff --git a/Modules/cPickle.c b/Modules/cPickle.c
--- a/Modules/cPickle.c
+++ b/Modules/cPickle.c
@@ -689,8 +689,7 @@
}
if (! str) return -1;
- Py_XDECREF(self->last_string);
- self->last_string = str;
+ Py_SETREF(self->last_string, str);
if (! (*s = PyString_AsString(str))) return -1;
@@ -716,8 +715,7 @@
if ((str_size = PyString_Size(str)) < 0)
return -1;
- Py_XDECREF(self->last_string);
- self->last_string = str;
+ Py_SETREF(self->last_string, str);
if (! (*s = PyString_AsString(str)))
return -1;
@@ -3228,9 +3226,8 @@
"attribute deletion is not supported");
return -1;
}
- Py_XDECREF(p->pers_func);
Py_INCREF(v);
- p->pers_func = v;
+ Py_SETREF(p->pers_func, v);
return 0;
}
@@ -3242,9 +3239,8 @@
"attribute deletion is not supported");
return -1;
}
- Py_XDECREF(p->inst_pers_func);
Py_INCREF(v);
- p->inst_pers_func = v;
+ Py_SETREF(p->inst_pers_func, v);
return 0;
}
@@ -3270,9 +3266,8 @@
PyErr_SetString(PyExc_TypeError, "memo must be a dictionary");
return -1;
}
- Py_XDECREF(p->memo);
Py_INCREF(v);
- p->memo = v;
+ Py_SETREF(p->memo, v);
return 0;
}
@@ -5667,16 +5662,14 @@
{
if (!strcmp(name, "persistent_load")) {
- Py_XDECREF(self->pers_func);
- self->pers_func = value;
Py_XINCREF(value);
+ Py_SETREF(self->pers_func, value);
return 0;
}
if (!strcmp(name, "find_global")) {
- Py_XDECREF(self->find_class);
- self->find_class = value;
Py_XINCREF(value);
+ Py_SETREF(self->find_class, value);
return 0;
}
@@ -5692,9 +5685,8 @@
"memo must be a dictionary");
return -1;
}
- Py_XDECREF(self->memo);
- self->memo = value;
Py_INCREF(value);
+ Py_SETREF(self->memo, value);
return 0;
}
diff --git a/Modules/cdmodule.c b/Modules/cdmodule.c
--- a/Modules/cdmodule.c
+++ b/Modules/cdmodule.c
@@ -628,12 +628,10 @@
CDsetcallback(self->ob_cdparser, (CDDATATYPES) type, CD_callback,
(void *) self);
#endif
- Py_XDECREF(self->ob_cdcallbacks[type].ob_cdcallback);
Py_INCREF(func);
- self->ob_cdcallbacks[type].ob_cdcallback = func;
- Py_XDECREF(self->ob_cdcallbacks[type].ob_cdcallbackarg);
+ Py_SETREF(self->ob_cdcallbacks[type].ob_cdcallback, func);
Py_INCREF(funcarg);
- self->ob_cdcallbacks[type].ob_cdcallbackarg = funcarg;
+ Py_SETREF(self->ob_cdcallbacks[type].ob_cdcallbackarg, funcarg);
/*
if (type == cd_audio) {
diff --git a/Modules/itertoolsmodule.c b/Modules/itertoolsmodule.c
--- a/Modules/itertoolsmodule.c
+++ b/Modules/itertoolsmodule.c
@@ -494,8 +494,7 @@
link = teedataobject_jumplink(to->dataobj);
if (link == NULL)
return NULL;
- Py_DECREF(to->dataobj);
- to->dataobj = (teedataobject *)link;
+ Py_SETREF(to->dataobj, (teedataobject *)link);
to->index = 0;
}
value = teedataobject_getitem(to->dataobj, to->index);
diff --git a/Modules/signalmodule.c b/Modules/signalmodule.c
--- a/Modules/signalmodule.c
+++ b/Modules/signalmodule.c
@@ -621,8 +621,7 @@
if (Handlers[SIGINT].func == DefaultHandler) {
/* Install default int handler */
Py_INCREF(IntHandler);
- Py_DECREF(Handlers[SIGINT].func);
- Handlers[SIGINT].func = IntHandler;
+ Py_SETREF(Handlers[SIGINT].func, IntHandler);
old_siginthandler = PyOS_setsig(SIGINT, signal_handler);
}
diff --git a/Modules/zlibmodule.c b/Modules/zlibmodule.c
--- a/Modules/zlibmodule.c
+++ b/Modules/zlibmodule.c
@@ -491,8 +491,7 @@
PyString_AS_STRING(self->unused_data), old_size);
Py_MEMCPY(PyString_AS_STRING(new_data) + old_size,
self->zst.next_in, self->zst.avail_in);
- Py_DECREF(self->unused_data);
- self->unused_data = new_data;
+ Py_SETREF(self->unused_data, new_data);
self->zst.avail_in = 0;
}
}
@@ -504,8 +503,7 @@
(char *)self->zst.next_in, self->zst.avail_in);
if (new_data == NULL)
return -1;
- Py_DECREF(self->unconsumed_tail);
- self->unconsumed_tail = new_data;
+ Py_SETREF(self->unconsumed_tail, new_data);
}
return 0;
}
diff --git a/Objects/descrobject.c b/Objects/descrobject.c
--- a/Objects/descrobject.c
+++ b/Objects/descrobject.c
@@ -1332,8 +1332,7 @@
PyObject *get_doc = PyObject_GetAttrString(get, "__doc__");
if (get_doc) {
if (Py_TYPE(self) == &PyProperty_Type) {
- Py_XDECREF(prop->prop_doc);
- prop->prop_doc = get_doc;
+ Py_SETREF(prop->prop_doc, get_doc);
}
else {
/* If this is a property subclass, put __doc__
diff --git a/Objects/exceptions.c b/Objects/exceptions.c
--- a/Objects/exceptions.c
+++ b/Objects/exceptions.c
@@ -58,9 +58,8 @@
if (!_PyArg_NoKeywords(Py_TYPE(self)->tp_name, kwds))
return -1;
- Py_DECREF(self->args);
- self->args = args;
- Py_INCREF(self->args);
+ Py_INCREF(args);
+ Py_SETREF(self->args, args);
if (PyTuple_GET_SIZE(self->args) == 1) {
Py_CLEAR(self->message);
@@ -627,8 +626,7 @@
if (!subslice)
return -1;
- Py_DECREF(self->args); /* replacing args */
- self->args = subslice;
+ Py_SETREF(self->args, subslice);
}
return 0;
}
diff --git a/Objects/fileobject.c b/Objects/fileobject.c
--- a/Objects/fileobject.c
+++ b/Objects/fileobject.c
@@ -574,10 +574,8 @@
oerrors = Py_None;
Py_INCREF(Py_None);
}
- Py_DECREF(file->f_encoding);
- file->f_encoding = str;
- Py_DECREF(file->f_errors);
- file->f_errors = oerrors;
+ Py_SETREF(file->f_encoding, str);
+ Py_SETREF(file->f_errors, oerrors);
return 1;
}
diff --git a/Objects/frameobject.c b/Objects/frameobject.c
--- a/Objects/frameobject.c
+++ b/Objects/frameobject.c
@@ -859,8 +859,7 @@
}
} else if (values[j] != value) {
Py_XINCREF(value);
- Py_XDECREF(values[j]);
- values[j] = value;
+ Py_SETREF(values[j], value);
}
Py_XDECREF(value);
}
diff --git a/Objects/funcobject.c b/Objects/funcobject.c
--- a/Objects/funcobject.c
+++ b/Objects/funcobject.c
@@ -116,8 +116,7 @@
PyErr_SetString(PyExc_SystemError, "non-tuple default args");
return -1;
}
- Py_XDECREF(((PyFunctionObject *) op) -> func_defaults);
- ((PyFunctionObject *) op) -> func_defaults = defaults;
+ Py_SETREF(((PyFunctionObject *)op)->func_defaults, defaults);
return 0;
}
@@ -149,8 +148,7 @@
closure->ob_type->tp_name);
return -1;
}
- Py_XDECREF(((PyFunctionObject *) op) -> func_closure);
- ((PyFunctionObject *) op) -> func_closure = closure;
+ Py_SETREF(((PyFunctionObject *)op)->func_closure, closure);
return 0;
}
@@ -430,8 +428,7 @@
if (name != Py_None) {
Py_INCREF(name);
- Py_DECREF(newfunc->func_name);
- newfunc->func_name = name;
+ Py_SETREF(newfunc->func_name, name);
}
if (defaults != Py_None) {
Py_INCREF(defaults);
diff --git a/Objects/stringobject.c b/Objects/stringobject.c
--- a/Objects/stringobject.c
+++ b/Objects/stringobject.c
@@ -3865,8 +3865,7 @@
return;
}
v = string_concat((PyStringObject *) *pv, w);
- Py_DECREF(*pv);
- *pv = v;
+ Py_SETREF(*pv, v);
}
void
@@ -4751,8 +4750,7 @@
t = PyDict_GetItem(interned, (PyObject *)s);
if (t) {
Py_INCREF(t);
- Py_DECREF(*p);
- *p = t;
+ Py_SETREF(*p, t);
return;
}
diff --git a/Objects/typeobject.c b/Objects/typeobject.c
--- a/Objects/typeobject.c
+++ b/Objects/typeobject.c
@@ -166,9 +166,8 @@
are borrowed reference */
for (i = 0; i < (1 << MCACHE_SIZE_EXP); i++) {
method_cache[i].value = NULL;
- Py_XDECREF(method_cache[i].name);
- method_cache[i].name = Py_None;
Py_INCREF(Py_None);
+ Py_SETREF(method_cache[i].name, Py_None);
}
/* mark all version tags as invalid */
PyType_Modified(&PyBaseObject_Type);
@@ -2527,8 +2526,7 @@
method_cache[h].version = type->tp_version_tag;
method_cache[h].value = res; /* borrowed */
Py_INCREF(name);
- Py_DECREF(method_cache[h].name);
- method_cache[h].name = name;
+ Py_SETREF(method_cache[h].name, name);
}
return res;
}
diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -436,8 +436,7 @@
return -1;
Py_UNICODE_COPY(w->str, v->str,
length < v->length ? length : v->length);
- Py_DECREF(*unicode);
- *unicode = w;
+ Py_SETREF(*unicode, w);
return 0;
}
diff --git a/Python/_warnings.c b/Python/_warnings.c
--- a/Python/_warnings.c
+++ b/Python/_warnings.c
@@ -528,8 +528,7 @@
goto handle_error;
}
else if (!is_true) {
- Py_DECREF(*filename);
- *filename = PyString_FromString("__main__");
+ Py_SETREF(*filename, PyString_FromString("__main__"));
if (*filename == NULL)
goto handle_error;
}
diff --git a/Python/ceval.c b/Python/ceval.c
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -4360,8 +4360,7 @@
Py_INCREF(self);
func = PyMethod_GET_FUNCTION(func);
Py_INCREF(func);
- Py_DECREF(*pfunc);
- *pfunc = self;
+ Py_SETREF(*pfunc, self);
na++;
n++;
} else
diff --git a/Python/compile.c b/Python/compile.c
--- a/Python/compile.c
+++ b/Python/compile.c
@@ -1455,9 +1455,8 @@
if (!compiler_enter_scope(c, s->v.ClassDef.name, (void *)s,
s->lineno))
return 0;
- Py_XDECREF(c->u->u_private);
- c->u->u_private = s->v.ClassDef.name;
- Py_INCREF(c->u->u_private);
+ Py_INCREF(s->v.ClassDef.name);
+ Py_SETREF(c->u->u_private, s->v.ClassDef.name);
str = PyString_InternFromString("__name__");
if (!str || !compiler_nameop(c, str, Load)) {
Py_XDECREF(str);
--
Repository URL: https://hg.python.org/cpython
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